PLATE XXI. 



Cyclops insignis. 



Fig. 1. Anterior antenna of female. 



2. Anterior antenna of male. 



3. Posterior antenna. 



4. Mandible. 



5. Maxilla. 



6. Anterior foot-jaw. 



7. Posterior foot-jaw. 



8. Fifth foot. 



8 a. Appendage of first abdominal segment of 

 male. 



9. Caudal segment and setae. 



Cyclops cequoreus. 



10. Anterior antenna of female. 



11. Posterior antenna of female. 



12. Mandible. 



13. Anterior foot-jaw. 



14. Posterior foot-jaw. 



15. One of first pair of swimming feet. 



16. Abdomen and lower segments of thorax. 



17. Foot of fifth pair. 



